I don't have one particular favourite....truth be told. I don't care for Comedies or Demonic-type horror...but everything else is great.
Dramas. They usually can't be influenced by crap like CGi, explosions and what not. With dramas you have your story, and you live or die by that. After that I'd say it's sci fi and if it's a good sci fi/drama, I'm in heaven.
I don't really have one, I dont think. My two favourite films are about wiretapping - Is that a genre?